Duplicate Qualys Vulnerabilities for Auto-scaled servers

A common practice is to include the EC2 instance ID in the hostname, which provide uniqueness since instance IDs are unique within a region for an AWS account. Another approach is to use a combination of ASG tags and other instance details (like IP addresses or a random hash) to generate unique and descriptive hostnames.

Since the scenario is using ASG, one method could be to create an AWS Systems Manager State Manager association that sets a custom hostname on the instances. In your Auto Scaling group launch configuration or launch template, specify the Systems Manager association to be applied during instance launch.